The night you all return to the fort, chat with each other and Miloh into the night, and finally go to sleep, Caernak, Blu, Arcus, and Tison are haunted by terrible visions that waken them screaming. Most of the dreams are something like this, with individual variations:
You are laughing in the sun on a boat on the river, slapping each other and exchanging tales of your exploits. How glorious you all are! It starts as a good dream like this, then turns evil. Suddenly somehow you're back at your fort, peering into dark arrow-slits from outside, and you see shadows shifting in the dark inside. Whispers, shuffling, squeeking. Then arms grabbing limp bodies and tearing hunks of dripping flesh from them. Dull blue frozen corpses lying about like stones. Glinting black eyes blazing with evil flame. Blood sprays through the arrowslits onto your faces, and guttural voices guffaw in laughter. Then the ground opens beneath you, and claws reach for your legs and drag you into darkness.
You sleep no more that night, and some of you run to your arrowslits inside the fort and frantically peer out into the frozen night looking for approaching shadows. You see no real ones, though.